findRoots.js

window.fr = function(o) {
  var m = new Map();
  var rg = [{ pn: 'window', v: window, l: 0 }];
  function add(pc) {
    var p = pc.v;
    var l = pc.l + 1;
    for (var pn of Object.getOwnPropertyNames(p)) {
      try {
        var pd = Object.getOwnPropertyDescriptor(p, pn);
        //if (pd.get) continue;
        //console.log(pn, pd);
        var v = pd.hasOwnProperty('value') ? pd.value : p[pn];
        if (v == null) continue;
        var c = m.get(v);
        if (!c || pc.l < c.l) {
          var nc = { p: pc, pn: pn, v: v, l: l };
          if (!c)
            rg.push(nc);
          m.set(v, nc);
          if (v === o) {
            var rg2 = [];
            for (var pp = nc; pp; pp = pp.p)
              rg2.push(pp.pn);
            console.log(rg2.reverse().join('.'));
          }
        }
      }
      catch { }
    }
  }
  while (rg.length) {
    add(rg.pop());
  }
};